Crop the lower part of a Video or Image and other fast edits

Developer note:

Crops out a 93 pixel lower band:

ffmpeg -i 4.mp4 -filter_complex "[0:v]crop=in_w:in_h-93:0:0[cropped]" -map "[cropped]" 4a.mp4

Crops out a 34 pixel lower band:

convert 5.jpg -gravity South -chop 0x34 5a.jpg

Cuts out the last N seconds. -t needs to be the total length of the video, you must have to know the video length (in seconds) and specify the t parameter with the right value.

ffmpeg -i setup.mp4 -t 233 -c copy output.mp4